Critical [CVE-2026-25089] Second-Order OS Command Injection via JSON Input on start vnc feature
This critical-severity Fortinet advisory covers CVE-2026-25089 affecting FortiSandbox Cloud, FortiSandbox PaaS.
Android app · Google Play
Monitor future Fortinet CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
CVSSv3 Score:
9.1
An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.
Revised on 2026-06-09 00:00:00
CISA Known Exploited Vulnerability
- Listed:
- Jul 16, 2026 · federal remediation due Jul 19, 2026
- Required action:
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- Ransomware use:
- Unknown
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- FortiSandbox 5.0: 5.0.0 through 5.0.5
- FortiSandbox 4.4: 4.4.0 through 4.4.8
- FortiSandbox Cloud 5.0: 5.0.4 through 5.0.5
- FortiSandbox PaaS 5.0: 5.0.4 through 5.0.5
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- FortiSandbox 5.0: 5.0.6
- FortiSandbox 4.4: 4.4.9
- FortiSandbox Cloud 5.0: 5.0.6
- FortiSandbox PaaS 5.0: 5.0.6
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Upgrade per the Affected/Solution table: FortiSandbox 5.0: 5.0.6; FortiSandbox 4.4: 4.4.9; FortiSandbox Cloud 5.0: 5.0.6; FortiSandbox PaaS 5.0: 5.0.6.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.